package pl.wr.particle.def.matter.elementary.hypothetical.superpartners.gauginos;

import pl.wr.particle.def.matter.typeparticle.IHypotethicalParticle;

/**
 * The gravitino (symbol G͂) is the supersymmetric partner of the graviton, as
 * predicted by theories combining general relativity and supersymmetry; i.e.
 * supergravity theories. If it exists, it is a fermion of spin 3⁄2 and
 * therefore obeys the Rarita-Schwinger equation. The gravitino field is
 * conventionally written as ψμα with μ = 0,1,2,3 a four-vector index and α =
 * 1,2 a spinor index. For μ = 0 one would get negative norm modes, as with
 * every massless particle of spin 1 or higher. These modes are unphysical, and
 * for consistency there must be a gauge symmetry which cancels these modes:
 * δψμα = ∂μεα where εα(x) is a spinor function of spacetime. This gauge
 * symmetry is a local supersymmetry transformation, and the resulting theory is
 * supergravity. Thus the gravitino is the fermion mediating supergravity
 * interactions, just as the photon is mediating electromagnetism, and the
 * graviton is presumably mediating gravitation. Whenever supersymmetry is
 * broken in supergravity theories, it acquires a mass which is determined by
 * the scale at which supersymmetry is broken. This varies greatly between
 * different models of supersymmetry breaking, but if supersymmetry is to solve
 * the hierarchy problem of the Standard Model, the gravitino cannot be more
 * massive than about 1 TeV/c2.
 * 
 * @version 1.0
 * @author wieslaw.rodak
 *
 */
public interface IGravitino extends IHypotethicalParticle{

}
